RunTime---Setting the badgeview of Tabbarbutton

1. Get the member variables of the class--class_copyivarlist

if([Badgeviewchild iskindofclass:nsclassfromstring (@"_uibadgebackground")]) {  //NSLog (@ "Finally found you, fortunately did not give up");UnsignedintCount//after getting finished, the value of count is the number of member variables on the current class of code//get member variables on a classIvar *vars = class_copyivarlist (nsclassfromstring (@"_uibadgebackground"), &count); //Traverse View   for(intI=0; i<count; i++) {Ivar var=Vars[i]; //get the name of VarNSString *name =[NSString Stringwithcstring:ivar_getname (Var) encoding:nsutf8stringencoding]; //Get TypeNSString *type =[NSString stringwithcstring:ivar_gettypeencoding (Var) encoding:nsutf8stringencoding]; NSLog (@"%@=====%@", Name,type);       if([Name isequaltostring:@"_image"]) {          //assigning values via KVC[Badgeviewchild setvalue:[uiimage imageNamed:self.badgeImageName] forkeypath:name]; }    }  //Freeing MemoryFree (VARs);
}

2, method Exchange and the original method after the call to do their own logic

+ (void) load{Staticdispatch_once_t Oncetoken; Dispatch_once (&oncetoken, ^{Class Clazz= [Selfclass]; //get the original method with the SEL that needs to interactSEL Originalselector =@selector (setbadgevalue:); SEL Swizzledselector=@selector (wb_setbadgevalue:); //get the method on the class by SelMethod Originalmethod =Class_getinstancemethod (Clazz, originalselector); Method Swizzledmethod=Class_getinstancemethod (Clazz, swizzledselector); //add a method to a classBOOL result =Class_addmethod (Clazz, Originalselector, Method_getimplementation (Swizzledmethod), method_gettypeencoding (                Swizzledmethod)); if(Result) {//If you add success, replace the method implementationClass_replacemethod (Clazz, Swizzledselector, Method_getimplementation (Originalmethod), method_getTypeEncod        ING (Originalmethod)); }Else{            //no added success, direct Exchange method implementationmethod_exchangeimplementations (Originalmethod, Swizzledmethod); }    });}

3. Object Association--to set an association object to any NSObject object--to solve the classification, add a new property to the Get and set method (the method to add attributes to the classification)

// Set association Properties -(void) Setbadgeimagename: (NSString *) badgeimagename{    @ "haha  ", Badgeimagename, objc_association_copy_nonatomic);} -(NSString *) badgeimagename{    return@ "haha");}

Modify the display of the badgevalue displayed by the system

Implementation: Adding Categories to Uitabbaritem (badgevalueimage)

The specific implementation is as follows:

UITabBarItem.h

// //   uitabbaritem+badgevalueimage.h////  Created by Ji on 15/8/20. //   Copyright (c) 2015 Ji. All rights reserved. // #import <UIKit/UIKit.h>@interface*badgeimagename; @end

Uitabbaritem.m

////UITABBARITEM+BADGEVALUEIMAGE.M////Created by Ji on 15/8/20.//Copyright (c) 2015 Ji. All rights reserved.//#import "uitabbaritem+badgevalueimage.h"#import<objc/runtime.h>@implementationUitabbaritem (badgevalueimage)+ (void) load{Staticdispatch_once_t Oncetoken; Dispatch_once (&oncetoken, ^{Class Clazz= [Selfclass]; //get the original method with the SEL that needs to interactSEL Originalselector =@selector (setbadgevalue:); SEL Swizzledselector=@selector (wb_setbadgevalue:); //get the method on the class by SelMethod Originalmethod =Class_getinstancemethod (Clazz, originalselector); Method Swizzledmethod=Class_getinstancemethod (Clazz, swizzledselector); //add a method to a classBOOL result =Class_addmethod (Clazz, Originalselector, Method_getimplementation (Swizzledmethod), method_gettypeencoding (                Swizzledmethod)); if(Result) {//If you add success, replace the method implementationClass_replacemethod (Clazz, Swizzledselector, Method_getimplementation (Originalmethod), method_getTypeEncod        ING (Originalmethod)); }Else{            //no added success, direct Exchange method implementationmethod_exchangeimplementations (Originalmethod, Swizzledmethod); }    });}- (void) Wb_setbadgevalue: (NSString *) badgevalue{//calling the parent class[self wb_setbadgevalue:badgevalue]; //Implementing Logic//if Badgevalue is nil. Direct return    if(!badgevalue) {        return; }        //What we can get directly is Wbtabbar.Uitabbarcontroller *target = [Self Valueforkeypath:@"_target"];  for(UIView *tabbarchildinchtarget.tabBar.subviews) {//Looking for Uitabbarbutton        if([Tabbarchild iskindofclass:nsclassfromstring (@"Uitabbarbutton")]) {             for(UIView *tabbarbuttonchildinchtabbarchild.subviews) {if([Tabbarbuttonchild iskindofclass:nsclassfromstring (@"_uibadgeview")]) {                     for(UIView *badgeviewchildinchtabbarbuttonchild.subviews) {if([Badgeviewchild iskindofclass:nsclassfromstring (@"_uibadgebackground")]) {                            //NSLog (@ "Finally found you, fortunately did not give up");UnsignedintCount//after getting finished, the value of count is the number of member variables on the current class of code//get member variables on a classIvar *vars = class_copyivarlist (nsclassfromstring (@"_uibadgebackground"), &count); //Traverse View                             for(intI=0; i<count; i++) {Ivar var=Vars[i]; //get the name of VarNSString *name =[NSString Stringwithcstring:ivar_getname (Var) encoding:nsutf8stringencoding]; //Get TypeNSString *type =[NSString stringwithcstring:ivar_gettypeencoding (Var) encoding:nsutf8stringencoding]; NSLog (@"%@=====%@", Name,type); //                                if([Name isequaltostring:@"_image"]) {                                    //assigning values via KVC[Badgeviewchild setvalue:[uiimage ImageNamed:self.badgeImageName] forkeypath:name]                                ; }                            }                            //Freeing MemoryFree (VARs); }                    }                }            }        }    }}//Setting Association Properties- (void) Setbadgeimagename: (NSString *) badgeimagename{objc_setassociatedobject (self,@"haha", Badgeimagename, objc_association_copy_nonatomic);}-(NSString *) badgeimagename{returnObjc_getassociatedobject (Self,@"haha");}@end

RunTime---Setting the badgeview of Tabbarbutton